Washington (CNN) – In the wake of the Newtown, Connecticut school shooting, one of the state’s senators announced Tuesday he will introduce legislation requiring background checks to buy ammunition.

“Ammunition is now the black hole in gun violence prevention,” Democratic Sen. Richard Blumenthal said. Blumenthal said it is illegal to sell either guns or ammunition to certain groups of people including felons, the mentally ill and those who commit domestic violence. But under current law someone can buy bullets from a gun store without any review of the person’s background.